In other news, this week we were surprised to learn that cleaning your teeth with seaweed can be better than toothpaste. (It won't give you that minty-fresh aftertaste, though.) We also had our minds blown by this incredibly detailed Death Star made from a single ping pong ball.

ENGADGET: Inhabitat's Week in Green: rise of solar power, cardboard forts and a Death Star ping pong ball

The BDA does not accredit a toothpaste for a whitening claim alone but accreditation can be given to toothpastes that demonstrate effective cleaning alongside dental health benefits.

BBC: Whitening toothpastes 'don't work'